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Update to gcc6809lw patch which may help compilation of some sources Due to persistent random compiler crashes and errors related to "M_REGS", this patch update (4.6.4-2) essentially removes the varius constraints allowing the "soft registers" in most operations. It was causing more problems than it solved and it is not clear that the logic behind those soft registers even makes sense any more. This patch also fixes a bogus comparison related to selecting the right size for a constant. Instead of the excessively clever comparison scheme that was previously in use, the comparisons have been replaced with straight forward comparisions for the top and bottom of the relevant 2's complement ranges.
author William Astle <lost@l-w.ca>
date Mon, 20 Jul 2015 22:32:41 -0600
parents fc166b3bbae3
children
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1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
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2 <HTML
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3 ><HEAD
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4 ><TITLE
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5 >Convenience Instructions</TITLE
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6 ><META
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7 NAME="GENERATOR"
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8 CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
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9 REL="HOME"
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10 TITLE="LW Tool Chain"
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11 HREF="index.html"><LINK
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12 REL="UP"
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13 TITLE="LWASM"
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14 HREF="c62.html"><LINK
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15 REL="PREVIOUS"
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16 TITLE="Assembler Modes and Pragmas"
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17 HREF="x659.html"><LINK
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18 REL="NEXT"
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19 TITLE="Cycle Counts"
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20 HREF="x800.html"></HEAD
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21 ><BODY
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22 CLASS="SECTION"
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23 BGCOLOR="#FFFFFF"
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25 LINK="#0000FF"
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26 VLINK="#840084"
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27 ALINK="#0000FF"
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28 ><DIV
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29 CLASS="NAVHEADER"
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30 ><TABLE
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31 SUMMARY="Header navigation table"
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32 WIDTH="100%"
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33 BORDER="0"
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34 CELLPADDING="0"
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35 CELLSPACING="0"
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36 ><TR
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37 ><TH
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38 COLSPAN="3"
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39 ALIGN="center"
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40 >LW Tool Chain</TH
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41 ></TR
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42 ><TR
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43 ><TD
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44 WIDTH="10%"
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46 VALIGN="bottom"
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47 ><A
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48 HREF="x659.html"
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49 ACCESSKEY="P"
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50 >Prev</A
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51 ></TD
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52 ><TD
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53 WIDTH="80%"
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54 ALIGN="center"
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55 VALIGN="bottom"
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56 >Chapter 3. LWASM</TD
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57 ><TD
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58 WIDTH="10%"
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59 ALIGN="right"
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60 VALIGN="bottom"
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61 ><A
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62 HREF="x800.html"
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63 ACCESSKEY="N"
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64 >Next</A
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65 ></TD
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66 ></TR
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67 ></TABLE
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68 ><HR
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69 ALIGN="LEFT"
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70 WIDTH="100%"></DIV
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71 ><DIV
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72 CLASS="SECTION"
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73 ><H1
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74 CLASS="SECTION"
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75 ><A
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76 NAME="CONVINST"
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77 >3.11. Convenience Instructions</A
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78 ></H1
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79 ><P
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80 >&#13;Similar to the 6800 compatibility instructions (pragma 6800compat) these
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81 pragma 6809conv and pragma 6309conv enable convenience extensions to the
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82 6809 and 6309 instruction set. Originally intended for compatibility with
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83 the MACRO-80c assembler, these have proven useful in large codebases that
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84 target both the 6809 and the 6309.</P
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85 ><P
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86 >&#13;The 6809 extensions are straightforward with the exception of "TSTD" which
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87 assembles as "STD -2,S". A benefit of using these is they will "just work"
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88 and take on their 6309 equivalent when you enable 6309 assembly mode.
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89 Supported instructions: ASRD, CLRD, COMD, LSLD, LSRD, NEGD, TSTD.</P
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90 ><P
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91 >&#13;6309 extensions are based on common patterns described by Chris Burke and
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92 Darren Atkinson in their 6309 documentation and include the following
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93 instructions: ASRQ, CLRQ, COMQ, LSLE, LSLF, LSLQ, LSRQ, NEGE,
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94 NEGF, NEGW, NEGQ, TSTQ.</P
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95 ></DIV
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96 ><DIV
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97 CLASS="NAVFOOTER"
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98 ><HR
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99 ALIGN="LEFT"
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100 WIDTH="100%"><TABLE
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101 SUMMARY="Footer navigation table"
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102 WIDTH="100%"
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103 BORDER="0"
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104 CELLPADDING="0"
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105 CELLSPACING="0"
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106 ><TR
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107 ><TD
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108 WIDTH="33%"
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109 ALIGN="left"
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110 VALIGN="top"
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111 ><A
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112 HREF="x659.html"
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113 ACCESSKEY="P"
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114 >Prev</A
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115 ></TD
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116 ><TD
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117 WIDTH="34%"
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118 ALIGN="center"
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119 VALIGN="top"
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120 ><A
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121 HREF="index.html"
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122 ACCESSKEY="H"
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123 >Home</A
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124 ></TD
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125 ><TD
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126 WIDTH="33%"
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127 ALIGN="right"
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128 VALIGN="top"
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129 ><A
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130 HREF="x800.html"
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131 ACCESSKEY="N"
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132 >Next</A
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133 ></TD
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134 ></TR
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135 ><TR
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136 ><TD
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137 WIDTH="33%"
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138 ALIGN="left"
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139 VALIGN="top"
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140 >Assembler Modes and Pragmas</TD
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141 ><TD
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142 WIDTH="34%"
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143 ALIGN="center"
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144 VALIGN="top"
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145 ><A
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146 HREF="c62.html"
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147 ACCESSKEY="U"
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148 >Up</A
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149 ></TD
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150 ><TD
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151 WIDTH="33%"
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152 ALIGN="right"
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153 VALIGN="top"
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154 >Cycle Counts</TD
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155 ></TR
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156 ></TABLE
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157 ></DIV
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158 ></BODY
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159 ></HTML
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160 >